Electric door control



NOV. 20, 1934. H c BLQDGETT 1,981,026

ELECTRIC DOOR CONTROL Original Filed March 16, 1928 4 Sheets-Sheet 1 Fii li l l Ell Tfi

157 glsa QED m NOV. 20, 1934. c BLODGETT 1,981,026

ELECTRIC DOOR CONTROL Original Filed March 16, 1928 4 Sheets-Sheet 2 a rI 1 o H 71 221 W fivenfior: llerberb 0.310190% NOV. 20, 1934. c BLODGETT1,981,026

ELECTRIC DOOR CONTROL Original Filed March 16, 1928 4 Sheets-Sheet 5NOV. 20, 1934- H, c BLODGETT 1.981,026

ELECTRIC DOOR CONTROL Original Filed March 16, 1928 4 Sheets-Sheet 4iii/mew): fier'berb 1.2 fizbdg w Patented Nov. 20,

PATENT OFFICE 1.08am v "nmc'rmc noon con'raor. Herbert Cady modgemnmrmCity, ma, u-.

liner City, Ind.

.- to Door Control Company,

Hartford Original application m1. 1c, 1928, Serial No. 262,308. Dividedand this application August 10, 1931, Serial No. 5511,2041v 7 Claims.

This application is a division of application filed March 16, 1928,Serial No. 262,309.

The object of this invention is to provide improved reverse and cut-outmeans for such a door structure. I

Objects pertaining to details of construction and operation will appearfrom the description to follow. A structure which is a preferredembodiment of my invention is illustratedin the accompanying drawings,in which:

Fig. 1 is a detail perspective view from the inside of a building, withone of my improved electrically controlled door structures installed,the upper inner part of the door track being'broken away.

Fig. 2 is a vertical elevation view showing diagrammatically therelation of the doc the track and the counterbalance means, and myimproved controller carriage in position.

80 Fig. 3 is a plan view of the improved controller carriage, carryingtrack and reversing devices, the traction chain being in dotted lines.

Fig. 4 is an enlarged detail transverse sectional elevation on line 4-4of Figs. 8 and ii.v showing details of the controller carriageandtheslides or runners, portions being indicated by dotted lines.

Fig. 5 is an enlarged detail sectional view taken on line 5-5 of Figs. 3and 4, the carriage being 80 located at the end of the track in theposition in which the door is closed, and portions of the track and doorand the connection thereto to the carriage being illustrated.

Fig. 6 is the wiring diagram.

Fig. 7 is an enlarged detail view of the switch actuating means.

The parts will be identified by their numerals of reference which arethe same in all the views.

1 is a door made up of horizontal sections ihinged together to travel tothe overhead position. 2 is the track with vertical and horizontalparts. 3 is the counter-balance cable disposed over guide pulley 4. 5 isthe counter-balance spring connected to guide clevis pulley 51 for the46 counter-balance cable at one end and to the wall 52 and disposedhorizontally above the horizontal portion of the track.

These parts are all substantially shown and described in U. 8. Patent1,508,886 issued September 16, 1924, to Dautrlck, Johnson and Kraska foroverhead door, in which patent will be found complete details notnecessary to include here.

6 is the door controller carriage which is electrically driven. 66 Thecontroller carriage 6 comprises the steel frame 61' on which the entireelectrical nism ismounted. 62 is a steel top plate or cover for thepurpose of carrying a portion of the mechanism, as well as binding theframe together at the'top for-the purpose of strength. 63, 63 are woodenrunners secured at each sidev of the carriage and slide on suitablerails. These runners cause the proper amount of friction on the rails toprevent the carriage overrunning. These are properly denominatedfriction runners. 64 is a link connected at 641 to the carriage and at642 to the door.

7 is a channel-shaped track for accommodation of the runners 63. '11 isa stiffening channel bar, like track '7, secured back to back to track70 7 and afiords adjustable attachment for switch levers and trips andthe like. 8, 8 are the ,spreaders with clamp bolts for holding the trackin position. 72 are the beams above which carry the entire structure,being secured to the ceiling or end walls of the building, as the casemay be, this detailnot being here shown. 9 is a stationary sprocketchain carried at its ends by the cross pieces or spreaders 8. 10 are thechain bolts with book ends at each end of the chain. 11 are the springsdisposed on the bolts 10- under compression nuts 11' 11 on said bolts,so that the chain '-*yields in either direction bythe compression of;these springs. This cushions the device and also permits easy startingof the carriage, thus accommodating its action to the action of theelectric motor which drives it. Any spring cushion could be provided.

12 is the electric motor supported in carriage 6 and furnishing powerfor the operation of the said controller carriage. It is of alternatingcurrent, and in practice is'adjustable to 110 to 220 volts of thevarious cycles.

120 is the motor spindle. 121 is a reduction gearing on shaft 121'serving to reduce the motor speed and deliver power to the main gear 122which is on shaft 137. 133 is the friction drive unit. It consists ofthe main gear 122 on shaft 137 which provides the drive connectionthrough suitable friction means to the sprocket drive frame to supportthe shafts for these structures. no

135 18 the the slide.

'channel 71 to cooperate with one end of lever 18 (see diagram Fig. 6).

14, 14 are idler sprocket wheels on shaft 141 disposed in proximity toand coacting with the sprocket wheel 134 and maintain the sprocket chain9 inproper operative relation to sprocket wheel 134.

It will be seen that if the carriage or the parts which it drivesencounter any undue resistance, the friction disks 131 and 132 slip andpermit the motor to run without driving the door or the carriage. Thedoor being counterbalanced, very slight power is required and thefriction is adjusted to low resistance, thus making it impossible forthe door which is counterbalanced to seriously injure anyone because ofthis frictional connection to the motor which drives it.

The electric connections and controls will be explained in connectionwith the diagram Fig. 6 along with Figs. 3, 4 and 5. The motor leads aresuspended in loops and swing with the carriage and motor as they moveback and forth.

15 is the switch panel for the motor which is provided with connections151, 152, 153 and 154 for the motorleads, 151 and 154 being the runningleads, while 152 and 153 are the directional leads which are controlledby the reversing switch to be described. 155 and 156 are the powerterminals, and 157 and 158 are the push button terminals. Push buttons159 at various places serve to control the structure and initiate itsoperation A manual cut-out switch 159' is provided in proximity to thepush buttons so that when it is desired to stop the motor and the doormanually, it can be done by cutting oif the power lead manually.

16 is a reversing switch of usual construction.

' 17 is a cut-out switch. 18 is the switch lever connected to theU-channel slide 181 for the purpose of operating the cut-out switch 17.19 is a switch lever with a U-channel slide 191 connected for operatingthe reversing switch 16. 20 is a stop means for the switch lever 19 and21 is a stop means for the switch lever 18. Switch lever 19 is fulcrumedat one end at 192. Switch lever 18 is fulcrumed intermediate its lengthat 182 (see Fig. 3), and projects at both sides of the control carriageto actuating positions.

These parts are illustrated in Fig. 7. Switch 16 is indicated by dottedlines and its tumbler 161 projects through aperture 193 in slide 191 andis consequently actuated by the movement of Cut-out switch 17 isindicated by dotted lines. Its tumbler 171 projects through aperture 183in the slide 181 and is engaged and actuated thereby.

22 is a yielding spring trip, disposed upon the to cut out the motorwhen the door is fully closed. 23 is a similar yielding spring tripdisposed on the track to act on the projecting ends of switch lever 19to reverse the switch and on lever 18 to out out the motor when the doorreaches its open position. Because the trip finger yields, the lever,after being tripped by the same, passes the trip, the carriage havingsufficient momentum to carry the same by the trip. The details of thetors now on the market.

carried past by the controller carriage and permit travel freely ineither direction.

I have described all the parts of my structure and will now brieflyindicate their operation. Assume the door to be in'the open position andthe carriage at the extreme left of Fig. 3. One of the push buttons isthen closed which starts the motor. The end of lever 18 strikes the trip23 and automatically closes this cut-out, and as the carriage iscarriedforward the end of lever 19 strikes the said trip 23 and reverses thereversing switch. This, however, due to the character of the motor, doesnot reverse the motor until it stops and startsagain, it being necessaryfor the motor to come to a stop before it can be reversed. The carriagetravels, carrying the door to the closing position, and the opposite endof the cut-out lever 18 strikes the spring finger 22 and it is trippedand cuts out the motor, and there is suflicient momentum to carry thedoor to the completely closed position.

When it is desired to open the door, the push button is again pressed,and because the reversing switch has been reversed the motor starts inthe opposite direction and opens the door. As soon as the lever 18'passes the trip finger 22 it cuts the motor in again and it continues totravel until the door is open. The reversing switch lever 19 firststrikes the spring finger 23 and throws it to the reverse position, andthe end of the lever 18 then strikes the trip 23 and cuts out the motorand stops it, the overrun motion being suflicient to completely open thedoor.

If, in closing the door, after the door is started in its travel, it isdesired to stop it, it can be done by opening the manually controlledcut-out switch 159'. When the door comes to a stop and the cut-outswitch 159 is again closed, the motor reverses because the reverseswitch had already been reversed when the door started to close. It isthus possible to control the door by manipulation of the manuallycontrolled switches.

This control is possible with a variety of mo- Motors with tickler coilssuch as appear and are described in Patent No. 1,661,719, issued March6, 1928, to Edwards lend themselves to such actuation. There arealsomotors with switches controlled by centrifugal devices which, afterstarting in one direction or the other, will continue to run until themotor is stopped and the centrifugal switch disengaged.

If the switch has been reversed, when the motor is next started it willrun in the opposite direction.

The control means can be very readily adapted to the usual sliding orswinging doors or any of the multitude of garage door designs and wouldbe of advantage. It is preeminently for an overhead door control. {34;

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. In combination, a door, an operating carriage therefor, a track,friction skids on said carriage slidable on said track, an electricmotor with reversing coils carried by said carriage, an automaticcut-out and an automatic reversing switch, levers with projecting endsfor operating said switches, spring trips disposed along the 1 track toactuate said levers to control the said reverse switch and to operatethe cut-out switch, means for closing the circuit to start the motor toinitiate the movement of said carriage to secure the operation andcontrol of said automatic cutout and automatic reverse switch, and amanually controlled cut-out switch in the power circuit.

2. In combination, a door, an operating carriage therefor, a track,friction skids on said carriage slidable on. said track, an electricmotor with reversing coils carried by said carriage, automatic cut-outand reversing switches, levers with projecting ends for operating thesaid switches, spring trips disposed along the track to actuate saidlevers to control the said reverse switch and to operate the automaticcutout switch, and means for closing the circuit to start the motor toinitiate the movement of said carriage to secure the operation andcontrol of said automatic cut-out switch and automatic reverse switch.

3. In an electric motor for actuating a door, the combination of a door,a track, a carriage for controlling said door, an electric motor forcontrolling said carriage, an automatic cut-out and automatic reversingswitch on said carriage, levers with projecting ends for operating saidswitches, reversible spring trips disposed along the track to actuatesaid levers to control said *automatic reverse switch and automaticcut-out switch, and independent means for closing the circuit to startthe motor to initiate the move- =ment 01' said carriage to control saiddoor.

4. In an electric motor for actuating a door, the combination of a door,a track, a carriage for controlling said door, an electric motor forcontrolling said carriage, automatic cut-out and reversing switches onsaid carriage, levers with projecting ends for operatng said switches,and reversible spring trips disposed along the track to actuate saidlevers to control the said automatic reverse switch and automaticcut-out switch.

5. In an electric motor for actuating a door, the combination of a door,a track, a carriage for controlling said door, an electric motor forcontrolling said carriage, automatic cut-out and reversing switches onsaid carriage, and reversible trips disposed along the track to actuatesaid reverse switch and said cut-out switch.

6. In an electric motor for actuating a door, the combination of a door,a track, a carriage for controlling said door, an electric motor forcontrolling said carriage, an automatic cut-out switch on the saidcarriage, a lever with projecting ends for operating said switch, andreversible spring trips disposed along the track to actuate said leverto control the said cut-out switch.

7. In an electric motor for actuating a door, the combination of a door,a track, a carriage for controlling said door, an electric motor forcontrolling said carriage, an automatic cut-out switch on the saidcarriage, and reversible trips disposed along the track to actuate saidcut-out switch.

HERBERT CADY BLODGE'I'I.

